Transparent filler unit for loose



Patented Feb. 25, 1941 LEAF BOOKS Frank Stanley Schade, Holyoke, Mass.,assignor to National Blank Book Company, a corporation of MassachusettsApplication June 7, 1940, Serial No. 339,346

9 Claims.- (Cl. 129-20) This invention relatesfo improved means forprotecting and reenforcing, or for protecting, reenforcing, andsupporting material which it is desired to display in loose-leaf books.In one 5 embodiment of the invention the protecting, supporting, andreenforcing features are combined to form a unitary filler structurewhich serves as a .carrier for'the material to be displayed. In otherembodiments the protecting and reenforcing features of the invention aremade applicable to display material which may itself form the fillersheets of the loose-leaf book.

For many purposes, as for example where the filler sheets of theloose-leaf book take the form of a catalogdisplay. samples ofadvertising copy or other flat sample material, it'is, desirable toprotect the displayed material against surface abrasion and otherhazards of excessive handling and also to reenforce the binding edges ofthe filler sheets'against the wear and tear of constant turning of thesheets on the rings of the binder.

A common device for protecting filler display material has been to foldasheet of transparent material upon itself and insert the filler sheetbetween the folds. extend to the binding edge of the filler and holesare provided in those free edges and in the filler sheet through whichthe rings are threaded. These holes are. in registration when threaded.but while in use the" edges of the holes in the filler and theprotecting folds wear on the rings individually. As the pages areflipped and turned back and forthin use the sheets have a tendency tospread. fanwise on the rings, and when the sheets are thus spreadtheprotecting leaves will tend to buckle and increase the wearing andtearing action still further.

It is the object of this invention to provide, not 40 only theprotection for the display material against surface abrasion, but toprovide a novel reenforcing means for the binding margin of thetransparent folder itself, and to support and protect the edges of theholes of the filler sheets against the excessive wear occasioned by therings.

Attempts have been made to reenforce the binding holes of priortransparent folders but these have met with little orno success sincethe composition of the material has no adhesive qualities and willresist any attempt to satisfactorily glue orpaste reenforcements on itssurface. This invention obviates any need to make such attempts andprotects the binding edges from wear because of its novel structure.

The free edges of the folder In the drawing- Fig. 1 is a front view ofone type of the improved display folder, with part of the binding lipbroken away;

- Fig. 2 is a front view'of another type of folder with parts brokenaway around one binding hole;

Fig. 3 is a front view. of the folder with a modified reenforcing means;

Fig. 4 is a section on line 4-.-4 of Fig. 1;

Fig. 5 is a section on line 5-5 of Fig. 2; and Fig. 6 is a section online 6-6 of Fig. 3.

The folder as seen in Fig. l is composed of a single sheet I of thin,transparent, flexible material folded back on itself to provide theprotective leaves of the folder. One leaf extends farther than theother, andthe free margin of this leaf is folded back tightly againstthe inner surface of the leaf to form a lip 2, underneath which the freeedge 3 of the other leaf is then inserted to complete the transparentcover for the matter to be displayed.

The creasing of these folds is of importance in making the mostserviceable display folder. While it is desirable to have a transparentmaterial of "a flexible character, at the same time it is important to'provide a material which will have a certain amount of yielding tensionwhere, it has been creased. There are cellulose products which, whencreased under heat, will hold the crease and cause the two surfaces topress together, thus providing the spring action desired.

I have found cellulose acetate sheets to be a good material from whichto shape the folder.

This spring action gives a gripping force to the surfaces adjacent thecrease and tends'to hold any inserted papers against shifting. Thetendency of the surfaces to grip may be seen in Figs. 4, 5, and6 wherethe crease has not been flattened but appears rounded and the surfacesare more or less pressed together by the action of the fold.

This tension is importantin providing a flattened cover for the displaysheet, but is of greater importance in its action on the binding edge ofthe folder. The lip beneath which the free edge of the folder is tuckedexerts a slight pressure on the tucked edge and keeps the leaves of thefolder snugly together and-holding the binding margin of the displaysheet closelyl between them.

It is in this edge of thefolder heldtby the lip that the binding holes.are punched. In the form of folder shown in Fig. 1 the holes 4 of thefolder are punched to the size ordinarily punched in the sheet which istobe displayed. Thus, the

holes in the display sheet and those in the folder will be inregistration (see Fig. 4) and the binding edge of the folder will act asa reenforclng means for the holes of the display sheet. The holes in thedisplay sheet will be reenforced by three thicknesses of folder materialand, because of the pressure by the lip, these edges will be preventedfrom spreading fanwise and will act as one reenforcing member with whichthe folder and contents may ride on the rings as a unit.

In the display folder shown in Fig. 2 a backing or filler sheet 5 isinserted in a cover made of a thin transparent sheet folded as describedin connection with the structure of Fig. 1. The binding holes 6 of thefiller sheet 5 are reenforced with metal patches 1 around each hole 6.Metal reenforcements represent the greatest available strength againsttearing and the metal reenforcements in this embodiment of the inventionare made the means on which the display filler turns on the rings as aunit. The holes 8 punched in the binding edge of the transparent foldsare larger than those in the filler sheet 5 so that the metalreenforcements take all the strain and the transparent material issubjected to no wear from the rings. This permits the use of very muchthinner transparent sheet material for the folder, if desired. Also,there is no need for minute accuracy in providing an exact registrationof the corresponding holes 6 and 8 (see Fig. 5).

The modification of Fig. 3 is designed for use in those instances wherea greater degree of resistance to wear on the rings is desired than isafforded by the three tightly associated plies of the transparentmaterial as shown in Fig. 1 and where the metal reenforcement of thedisplay sheet of Fig. 2 is for any reason impractical. Here the foldedlip is riveted to the back surface of thefolder by eyelets 9 throughwhich the rings of the binder may be threaded (see Fig. 6). The freeedge of the top leaf of the folder is provided with slots 10 to straddlethe rivets and permit insertion underneath the lip. The filler sheetsused for display in this embodiment are also slotted along their bindingedges to straddle the rivets.

Each of these embodiments provides a novel supporting, protecting, andreenforcing structure for use in displaying sheetsthat ordinarilyundergo. excessive handling in a loose-leaf book. The devices now in useare either inadequate or are so elaborate as to be cumbersome andlimited to one special use. By my invention a simple structure isprovided which, within the scope of the three modified forms disclosed,will cover any circumstances under which greater protection is desiredin any given situation. One of the modifications will meet anycontingency where display filler sheets require protection, support, orgreater binding strength.

I claim:

1. A display filler unit for loose-leaf ring type binders whichcomprises a sheet of thin. transparent material folded on itself. toform two leaves,

that edge portion of one leaf which is opposite the fold line beingtightly folded inwardly on itself to form a lip beneath which theadjacent free edge portion of the other leaf may be inserted and held, adisplay sheet enclosed between the leaves, said lip and the underlyingmarginal portions of the transparent leaves and display sheet formingthe binding margin of the unit and being provided with registeringbinding openings, said lip holding the binding margins of said leavesand display sheet in close association to turn as a unit on the bindingrings of the loose leaf binder in which the filler unit is inserted.

2. A display filler unit for loose-leaf ring type binders whichcomprises a sheet of thin transparent material folded on itself to formtwo leaves, that edge portion of one leaf which is opposite the foldline being tightly folded inwardly 'on itself to form a lip beneathwhich the adjacent free edge portion of the other leaf may be insertedand held, a display sheet enclosed between the leaves, said lip and theunderlying marginal portions of the transparent leaves and display sheetforming the binding'margin of the unit and being provided withregistering binding holes, said lip holding the binding margins of saidleaves and display sheet in close association to turn as a unit on thebinding rings of the loose leaf binder in which the filler unit isinserted, the binding holes of the display sheet being reenforced withmetal and the binding holes in the several portions of the transparentsheet being larger: than the reenforced holes of the display sheet sothat the binding strain of the unit as a whole is taken by thereenforcements carried by thedisplay sheet.

3. A display filler unit for loose-leaf ring type binders whichcomprises a sheet of transparent register with said eyelets andpermitting insertion of the slotted marginal portions beneath the lipwhereby said leaves and filler sheet turn as a unit on the binding ringsof the binder and the binding strain of the filler unit is carried bythe riveted eyelets.

4. A display filler unit for loose-leaf ring type binders whichcomprises a sheet of transparent material folded on itself to form twoleaves, that edge portion of one leaf which is opposite the fold linebeing tightly folded inwardly on itself to form a lip beneath which theadjacent free edge portion of the other leaf may be inserted and held,a. display sheet enclosed between the leaves, said lip and underlyingportions of the transparent leaves and display sheet forming the bindingmargin of the unit and being provided with registering binding holes,the binding margins-0f said leaves and display sheet being held by saidlip in close association whereby said lip and the underlying portions ofthe leaves form a three-ply reenforcement for the binding holes of thedisplay sheet as the parts turn as a unit on the binding rings of theloose-leaf binder in which they are inserted.

5. A reenforclng and protecting display holder for loose-leaf notebookfiller sheets which comprises a sheet of transparent material folded onitself to form two leaves between which a filler sheet may be inserted,that edge portion of one leaf which is opposite the fold line beingtightly folded on itself to form a lip beneath which the adjacent freeedge portion of the other leaf may be inserted and held, said lip andthe underlying marginal portions of the transparent leaves forming thebinding margin of the holder and being provided with registering bindingholes, the binding margins of said leaves being held by said lip inclose association to resist wear in a loose leaf book.

6. A display holder 'for loose-leaf notebook filler sheets whichcomprises a' sheet of transparent material folder! on itself to .formtwo leaves between which the filler sheet maybe in serted, the edgeportion of one of the leaves, which is opposite the fold line, beingtightly folded inwardly on itself to form a lip beneath which theadjacent free edge portion of the other leaf may be inserted, saidlipand the underlying portions of the leaves forming the binding margin ofthe holder for enclosing the binding margin of the filler sheet whenpositioned between the leaves, said lip andthe underlyingyortions of theleaves being provided with binder openings,

said openings registering with each other and adapted to register withthe binding openings of the enclosed filler sheet.

7. A reenforcing and protecting display holder for loose-leaf notebookfiller sheets which comprises a sheet of transparent material folded onitself to formtwo leaves between which a filler sheet may be inserted,that edge portion'of one leaf which is opposite the fold line beingtightly folded on itself to form a lip beneath which the 5 adjacent freeedge portion of the other leaf may be inserted and held, said lip andthe underlying marginal portions of the transparent leaves forming thebinding margin of the holder and being provided with registering bindingholes to register with the binding holes of a filler sheet,

the binding'margins of said leaves being held by said lip in closeassociation as a three-ply reenforcement for the binding holes of thefiller sheet.

8. A composite display unit for binding in a book structure, whichcomprsies a sheet of transparent material folded onitself to form twoleaves, that edge portion of one leaf which is opposite the fold linebeing tightly folded inwardly on itself to form alip beneath which theadjacent free edge portion of the other leaf is releasably inserted, adisplay sheet enclosed between the leaves, said lip, the display sheetand the underlying transparent leaf being provided with registeringbinding openings, saidlip holding the adjacent marginal portions of theleaves and display sheet in close association whereby said leaves anddisplay sheet turn as a unit in the binder.

9. A composite display unit for binding in a book structure, whichcomprises a sheet of transparent material folded on itself to form twoleaves, that edge portion of one leaf which is opposite the fold linebeing tightly folded inwardly on itself to form a lip beneath which theadjacent free edge portion of the other leaf may be inserted and held, adisplay sheet enclosed between the leaves, said lip and the underlyingportion of at least the leaf on which the lip is formed being providedwith registering binding holes, the binding margin of the display, sheetbeing provided with recesses registering with said binding holes, saidlip holding the adjacent marginal portions of the leaves and displaysheet in close association whereby said leaves and display sheet turn asa unit in the binder.

STANLEY SCHADE.

